DISTRIBUTION OF GOLD IN THE FOUNDATION ROCKS OF THE BRUSYLIV TECTONIC ZONE OF THE UKRAINIAN SHIELD

Brusyliv tectonic zone of the Ukrainian Shield was studied. It was found that high concentrations of gold (0.07 g/t) are characteristic of gabbro-amphibolite, while the average content (median) in the rocks is 0.015 g/t. After calculating the Clark concentration (CC) of gold, 3 groups of rocks were distinguished: high content (CC 2–5), close to Clark concentration (CC 0.8–1.2) and reduced content (CC 0.2–0.8). It was established that gold is most concentrated in gabbro-amphibolite (CC 5), granite-biotite gneiss (CC 4); the least – in pyroxenite and garnet-biotite gneiss (CC 0.2).